Defines a set of properties and methods for evaluating an expression that is associated with a control property at design time and to provide an expression editor sheet to the visual design host for use in the expression editor dialog box. This class is abstract.

Provides a base class for the design-time functionality of a Web Forms page and allows access to and manipulation of components and controls that are contained within the Web Forms page at design time.

Obsolete. Provides methods to access services for tracking the loading state of a Web Forms document, handling events at load time, accessing a document's location, managing a document's undo service, and setting a new selection within the document.

A delegate that refers to a method in a custom DesignerActionList object that is to be called by the InvokeTransactedChange method for implementing property changes in the designer's associated control.

Represents the method that will handle the ViewEvent event that is raised by visual design tools, such as Visual Studio 2005, implementing the IControlDesignerView interface. This class cannot be inherited.